Traction-suspension device with transosseous pin

Abstract

A traction-suspension device with transosseous pin having: a tensioning pin and tension sleeves immobilizable in adjustable axial position on the pin, two support bearings receiving the sleeves via ball bearings, a traction-suspension hoop adaptable on the bearings, a tensioning strirrup adaptable between the bearings on assembling endpieces formed by the sleeves in facing relation. The invention finds application with suspended-type splints.

What is claimed is: 
     
       1. Traction-suspension device with transosseous pin, of the type comprising a pin designed to go through a bone and of which the end portions can be subjected to a traction, one with respect to the other, by means of an adjustable tension rod, wherein said device comprises: a tensioning pin and tension sleeves immobilizable in adjustable axial position on the pin,   two support bearings receiving the said sleeves via ball bearings,   a traction-suspension hoop adaptable on the bearings,   a tensioning stirrup adaptable between the bearings on assembling endpieces formed by the sleeves in facing relation.   
     
     
       2. Device as claimed in claim 1, wherein each tension sleeve comprises a tubular endpiece which extends from an abutting shoulder connecting it to a cylindrical bearing provided for assembling the inner cage of a ball bearing connection with the corresponding bearing, the said sleeve being provided with an axial bore allowing the passage of the pin and issuing between the jaws of a clamp member formed by the sleeve on the opposite side of the endpiece. 
     
     
       3. Device as claimed in claim 2, wherein each sleeve is provided with an axial bore of greater diameter than the diameter of the pin, and wherein said jaws include a fixed jaw and a free jaw such that said bore issues on the level of the fixed jaw to comprise a groove in the fixed jaw, said groove extending from the axial bore and said groove having a radius equal to the radius of the pin and wherein said free jaw includes a supporting face which is adapted to clamp the pin against the fixed jaw. 
     
     
       4. Device as claimed in claim 2, wherein each sleeve is mounted by way of a roller bearing which is free to rotate in a supporting bearing formed by an elongated flange-like member comprising in at least one of its end-portions, a hole for hooking in one of the arms of the hoop. 
     
     
       5. Device as claimed in claim 4 wherein each sleeve is mounted in a flange-like member comprising a hole for its adaptation on to a supporting and/or mobilization splint. 
     
     
       6. Device as claimed in claim 1, wherein the traction-suspension hoop is constituted by two half-hoops. 
     
     
       7. Device as claimed in claim 1, wherein each tension sleeve comprises a tubular endpiece which extends from an abutting shoulder and wherein the tensioning stirrup comprises two arms mounted for pivoting by their substantially median part on a rigid web and comprising, at the level of their homologous ends, on the one hand, means connecting them with a tension rod means of adjustable length and on the other hand, axially split rings adapted to be threaded on the endpieces of the sleeves until they rest against the abutting shoulders. 
     
     
       8. Device as claimed in claim 1, further comprising a supporting member means fixed to the stirrup so that the pin will be prevented from rotating relative to the bone.